1136520661 has 2 divisors, whose sum is σ = 1136520662. Its totient is φ = 1136520660.

The previous prime is 1136520631. The next prime is 1136520713. The reversal of 1136520661 is 1660256311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1075446436 + 61074225 = 32794^2 + 7815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1136520661 - 2⁵ = 1136520629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1136520631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 568260330 + 568260331.

It is an arithmetic number, because the mean of its divisors is an integer number (568260331).

Almost surely, 2^1136520661 is an apocalyptic number.

It is an amenable number.

1136520661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1136520661 is an equidigital number, since it uses as much as digits as its factorization.

1136520661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1136520661 is about 33712.3220944509. The cubic root of 1136520661 is about 1043.5800746667.

Adding to 1136520661 its reverse (1660256311), we get a palindrome (2796776972).

The spelling of 1136520661 in words is "one billion, one hundred thirty-six million, five hundred twenty thousand, six hundred sixty-one".